Operation hanging bracket suitable for cantilever beam prestress tensioning construction

Abstract

The invention relates to an operation hanging bracket suitable for prestressed tension construction of a cantilever beam, which comprises a base with wheels and a hanging bracket, the bracket is connected to the upper end of the base; the overhanging structure is arranged on one side of the top end of the support, and the end of one side of the overhanging structure is connected with the top end of the support; and the hoisting moving device is arranged on the cantilever structure in a sliding mode, and the lower portion of the hoisting moving device can hook a hoisted object and drive the hoisted object to move. Through the base with the wheels, the whole device can move according to the construction progress, the working efficiency is improved, the cantilever structure can extend to the position above a non-construction area, the hoisting moving device arranged on the cantilever structure can achieve horizontal movement of a hoisted object, vertical movement of the hoisted object can be achieved through the chain block, accurate adjustment of the position of the hoisted object is achieved, and the construction efficiency is improved. The pre-stressed steel strand pulling device is convenient to pull pre-stressed steel strands, wide in adaptability, capable of saving the cost of hoisting equipment and capable of improving the construction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to an operating hanger suitable for prestressed tensioning construction of cantilevered beams. Background Art

[0002] At present, long-span bridges are usually constructed by hanging baskets in a segmented cantilevered pouring method, that is, setting up working platforms on both sides of the piers, and cantilevering cement concrete beams in a balanced manner, and applying prestressing in sections. The main equipment of the cantilever pouring method is a pair of mobile hanging baskets, which move on the beam sections that have been tensioned and anchored and connected to the pier body as a whole. The steel bars are tied, the formwork is erected, the concrete is poured, and the prestressing is applied. After completing the construction of this section, the hanging baskets move forward symmetrically by one section each to construct the next pair of beam sections, and move forward in sequence until the cantilever beam section is cast together.

[0003] Prestressing of cantilever beams is an important process in bridge construction. The prestressed steel bars are stretched to generate contraction force to improve the bearing capacity and crack resistance of the beam, thereby extending the service life of the bridge. However, the tensioning operation of the longitudinal prestressed steel strands of cantilever beams is in the suspended section, such as the tensioning of prestressed tendons on the top plate. Construction workers usually need to use small hoists to lift the working anchor and hydraulic jack to the designated position, and then perform operations such as strand threading, tensioning, and strand cutting. It is generally inconvenient to adjust the jack up and down and left and right, and the construction adjustment process is time-consuming and laborious. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide an operating hanger suitable for the prestressing construction of cantilevered beams, so as to solve the problems of inconvenient operation and inaccurate adjustment of equipment in the existing prestressing construction of cantilevered beams.

[0005] The technical solution to achieve the above-mentioned purpose is: an operating hanger suitable for prestressed tensioning construction of cantilevered beams, comprising: a base, which is movable with wheels; a bracket, which is connected to the upper end of the base; a cantilever structure, which is arranged on one side of the top of the bracket, and one end of the cantilever structure is connected to the top of the bracket; a lifting and moving device, which is slidably mounted on the cantilever structure, and the lifting and moving device can hook the lifting object at the bottom to drive the lifting object to move.

[0006] The present invention provides an operating hanger suitable for prestressed tensioning construction of cantilevered beams. Through a base with wheels, the whole can be moved according to the construction progress, thereby improving work efficiency. The cantilever structure can be extended to above the non-construction area. The hoisting moving device arranged thereon can realize horizontal movement of the hanging object. The hanging object can be moved up and down by a hand winch, thereby realizing precise adjustment of the position of the hanging object, being able to facilitate the threading of the prestressed steel strands, having wide adaptability, saving the cost of hoisting equipment, and improving construction efficiency.

[0007] A further improvement of the working hanger suitable for prestressed tensioning construction of cantilevered beams of the present invention is that the cantilever structure is provided with a guide groove, and the guide groove is arranged along the length direction of the cantilever structure.

[0008] A further improvement of the working hanger suitable for prestressed tensioning construction of cantilevered beams of the present invention is that the hoisting moving device comprises: two walking wheels, the two walking wheels are relatively arranged in the guide groove, and the two walking wheel shafts are connected and can roll synchronously on the guide groove; two first connecting members, the two first connecting members are respectively arranged on the outer sides of the two walking wheels, and the lower ends of the two first connecting members extend toward each other; a second connecting member, the second connecting member is arranged between the lower ends of the two first connecting members; and a long rod bolt, the long rod bolt passes through and connects the two first connecting members and the second connecting member.

[0009] A further improvement of the working hanger suitable for prestressed tensioning construction of cantilevered beams of the present invention is that the cantilever structure is also provided with: a plurality of limit members, a plurality of the limit members are arranged in the guide groove, and a plurality of the limit members are arranged on both sides of the walking wheel, which can limit the walking wheel.

[0010] A further improvement of the working hanger suitable for prestressed tensioning construction of cantilevered beams of the present invention is that the moving device also includes: a push-pull rod, one end of the push-pull rod passes through the first connecting piece and is connected to the shaft of the walking wheel, and the other end of the push-pull rod extends to the external space for construction personnel to pull; a hand chain hoist, the hand chain hoist is hooked under the second connecting piece, and the hoist is hoisted under the hand chain hoist, and the hand chain hoist can move up and down to drive the position of the hoist to change.

[0011] A further improvement of the working hanger suitable for prestressed tensioning construction of cantilevered beams of the present invention is that a notch is provided on the first connecting member, and the push-pull rod is passed through the notch in correspondence with the notch.

[0012] A further improvement of the working hanger suitable for prestressed tensioning construction of cantilevered beams of the present invention is that the hand chain hoist is provided with: a hook, which is connected to the upper end of the hand chain hoist and is hung on the second connecting piece; and a lifting hook, which is connected to the lower end of the hand chain hoist and is used to hook the lifting object.

[0013] A further improvement of the working hanger suitable for prestressed tensioning construction of cantilevered beams of the present invention lies in that an anti-unhooking device is provided on the hook.

[0014] A further improvement of the working hanger suitable for prestressed tensioning construction of cantilevered beams of the present invention is that a through hole is provided at the lower end of the second connecting member, and the through hole is used for the hook to hook and connect.

[0015] A further improvement of the working hanger suitable for prestressed tensioning construction of cantilevered beams of the present invention is that it also includes: a balance block, which is arranged on the upper end surface of the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a side view of an operating hanger suitable for prestressed tensioning construction of cantilevered beams.

[0017] Figure 2 for Figure 1 A partial enlarged view of .

[0018] Figure 3 It is a cross-sectional view of the lifting and moving device of the present invention.

[0019] Figure 4 It is another side view of an operating hanger suitable for prestressed tensioning construction of cantilevered beams according to the present invention.

[0020] Figure 5 The present invention is a schematic flow chart of a construction method of an operating hanger suitable for prestressed tensioning construction of cantilevered beams.

[0021] In the figure: 10, base; 101, wheels; 11, bracket; 111, column; 112, support rod; 113, stiffening rib; 114, connecting bolt; 12, cantilever structure; 121, guide groove; 13, lifting and moving device; 131, walking wheel; 132, first connecting piece; 133, second connecting piece; 1331, through hole; 134, long rod bolt; 135, push-pull rod; 136, hand winch; 1361, cable; 137, hook; 138, hook; 14, steel corbel; 15, hanging object; 16, limit piece; 17, sling; 18, balance block; 19, ; 20, beam; 21, prestressed steel strand. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] See also Figure 1 , showing a side view of a work hanger suitable for prestressed tensioning construction of cantilever beams of the present invention. The present invention provides a work hanger suitable for prestressed tensioning construction of cantilever beams, comprising: a base 10, the base 10 is movable with wheels 101.

[0024] The base 10 can be made of steel plate, and the upper end surface of the base 10 can be set to a horizontal plane. In this embodiment, after the base 10 moves to the target position, a skid stopper needs to be set outside the wheel 101 to prevent the base 10 from moving during construction and affecting the construction, thereby ensuring construction safety.

[0025] The bracket 11 is connected to the upper end of the base 10 .

[0026] The bracket 11 can be formed by welding channel steel.

[0027] In this embodiment, the bracket 11 is formed by connecting two support rods 112 and a column 111. The column 111 is vertically arranged on one side of the upper end surface of the base 10. The two support rods 112 are obliquely supported between the top of the column 111 and the upper end surface of the base 10, forming a triangular connection structure that can provide better supporting force.

[0028] In this embodiment, the column 111 is vertically supported between the base 10 and the cantilever structure 12, and a plurality of stiffening ribs 113 are provided between the column 111 and the base 10 to strengthen the connection between the column 111 and the base 10. The upper ends of the two support rods 112 are connected to the ends of the cantilever structure 12 via connecting bolts 114.

[0029] The cantilever structure 12 is disposed on one side of the top end of the bracket 11 , and one end of the cantilever structure 12 is connected to the top end of the bracket 11 .

[0030] The cantilever structure 12 is horizontally arranged, and one end of the cantilever structure 12 is connected to the top end of the bracket 11 .

[0031] In this embodiment, a steel corbel 14 is provided at the bottom of the cantilever structure 12 near the bracket 11 and connected to the column 111, thereby providing effective support and also having a reinforcement effect.

[0032] The hoisting and moving device 13 is slidably disposed on the cantilever structure 12 . A hanging object 15 can be hooked below the hoisting and moving device 13 to drive the hanging object 15 to move.

[0033] Among them, the hoisting object 15 is a tool such as a hydraulic jack and a working anchor. The hoisting moving device 13 drives the hoisting object 15 to move to the construction site for construction. The precise adjustment of the position of the hydraulic jack facilitates the threading of the prestressed steel strands 21 of the cast structure.

[0034] See also Figure 1 , showing a side view of a work hanger suitable for prestressing construction of cantilever beams of the present invention. The present invention provides a work hanger suitable for prestressing construction of cantilever beams, and the cantilever structure 12 is provided with: a guide groove 121, and the guide groove 121 is arranged along the length direction of the cantilever structure 12.

[0035] The length of the guide groove 121 is set according to the length of the cantilever structure 12 , and the depth of the guide groove 121 corresponds to the size of the running wheel 131 , which is not specifically limited here.

[0036] In this embodiment, the guide groove 121 is horizontally arranged to facilitate the horizontal movement of the hoisting moving device 13 .

[0037] See also Figure 2 and Figure 3 , Figure 2 Shows Figure 1 A partial enlarged view of Figure 3 The present invention provides a work hanger suitable for prestressing construction of cantilevered beams, and the hoisting and moving device 13 comprises: two running wheels 131, the two running wheels 131 are relatively arranged in the guide groove 121, and the two running wheels 131 are connected between axes and can roll synchronously on the guide groove 121.

[0038] The two running wheels 131 can roll repeatedly in the guide groove 121 .

[0039] In this embodiment, two parallel guide rails are arranged in the guide groove 121 and are respectively connected to the two running wheels 131 .

[0040] Two first connecting members 132 are respectively disposed on the outer sides of the two running wheels 131 , and the lower ends of the two first connecting members 132 extend toward each other.

[0041] The first connecting member 132 is connected to the shaft of the running wheel 131 and is disposed outside the running wheel 131 to protect the running wheel 131 .

[0042] The second connecting member 133 is disposed between the lower ends of the two first connecting members 132 .

[0043] The two sides of the second connecting member 133 are in contact with the two first connecting members 132 respectively.

[0044] The long rod bolt 134 penetrates and connects the two first connecting members 132 and the second connecting member 133 .

[0045] The first connecting member 132 and the second connecting member 133 are respectively provided with bolt holes for the long rod bolts 134 to pass through.

[0046] See also Figure 1 , showing a side view of a work hanger suitable for cantilever beam prestressing tensioning construction of the present invention. The present invention provides a work hanger suitable for cantilever beam prestressing tensioning construction, and the cantilever structure 12 is further provided with: a plurality of limit members 16, the plurality of limit members 16 are arranged in the guide groove 121, and the plurality of limit members 16 are arranged on both sides of the running wheel 131, which can limit the running wheel 131.

[0047] Among them, the limiter 16 is a steel wedge. After the hoisting mobile device 13 moves to the target construction position, the limiter 16 needs to be moved to both sides of the running wheel 131 to prevent the running wheel 131 from rolling and causing the hanging object 15 to shake, thereby ensuring construction safety.

[0048] See also Figure 2 and Figure 3 , Figure 2 Shows Figure 1 A partial enlarged view of Figure 3 The cross-sectional view of the lifting and moving device of the present invention is shown. The present invention provides an operation hanger suitable for prestressing construction of cantilevered beams, and the lifting and moving device 13 also includes: a push-pull rod 135, one end of the push-pull rod 135 passes through the first connecting member 132 and is connected to the shaft of the walking wheel 131, and the other end of the push-pull rod 135 extends to the external space for construction workers to pull.

[0049] The push-pull rod 135 can control the movement of the running wheel 131 , and the running wheel 131 can be directly positioned by the push-pull rod 135 , which has the effect of precise positioning.

[0050] The hand chain hoist 136 is hooked at the bottom of the second connecting member 133, and the hanging object 15 is hoisted at the bottom of the hand chain hoist 136. The hand chain hoist 136 can move up and down to drive the position of the hanging object 15 to change.

[0051] The hand chain hoist 136 changes the height of the hanging object 15 through the cable 1361, and the construction personnel control the cable 1361 to adjust the height of the hanging object.

[0052] The present invention provides an operation hanger suitable for the prestressed tensioning construction of cantilevered beams. A notch is provided on the first connecting member 132, and a push-pull rod 135 is passed through the notch correspondingly.

[0053] The push-pull rod 135 passes through the slot, and the inner diameter of the slot is larger than the diameter of the push-pull rod 135 .

[0054] See also Figure 2 and Figure 3 , Figure 2 Shows Figure 1 A partial enlarged view of Figure 3 The present invention provides a work hanger suitable for prestressing construction of suspended cast beams, wherein a hand chain hoist 136 is provided with a hook 137 connected to the upper end of the hand chain hoist 136 and hung on the second connecting member 133.

[0055] The hook 137 is vertically hung on the second connecting member 133 and is hung in the middle of the lower end of the second connecting member 133 .

[0056] The hook 138 is connected to the lower end of the hand winch 136 , and the hook 138 hooks the hanging object 15 .

[0057] The hanging object 15 is suspended by a sling 17 , and the hook 138 is connected to the sling 17 .

[0058] The present invention provides an operating hanger suitable for prestressed tensioning construction of cantilevered beams, and an anti-unhooking device is provided on the hook 138.

[0059] Among them, the anti-unhooking device can protect the hanging object 15 and also protect the safety of construction.

[0060] See also Figure 2 , showing Figure 1 The present invention provides a work hanger suitable for prestressing construction of cantilevered beams, wherein a through hole 1331 is provided at the lower end of the second connecting member 133, and the through hole 1331 is provided for hooking and connecting with a hook 137.

[0061] The through hole 1331 is located at the middle position of the lower end of the second connecting member 133 to ensure the force balance of the second connecting member 133 and the entire lifting and moving device 13 .

[0062] See also Figure 1 , showing a side view of a work hanger suitable for prestressing construction of cantilever beams of the present invention. The present invention provides a work hanger suitable for prestressing construction of cantilever beams, and also includes: a balance block 18, and the balance block 18 is arranged on the upper end surface of the base 10.

[0063] A balancing block 18 of corresponding weight is selected according to the weight of the hanging object 15. The large weight of the balancing block 18 itself ensures the stability of the base 10, thereby preventing the base 10 from becoming unstable during construction.

[0064] See also Figure 5 , showing a schematic flow chart of a construction method of a work hanger suitable for prestressed tensioning construction of cantilever beams according to the present invention. A construction method of a work hanger suitable for prestressed tensioning construction of cantilever beams comprises the following steps:

[0065] Execute step S210: move the hanger as a whole to a designated tensioning area on the beam 20 via the wheeled base 10;

[0066] Execute step S220: place the balancing weight 18 on the base 10 by a forklift;

[0067] Execute step S230: fix the hanging object 15 with the sling 17, hang it on the hook 138 of the hand chain hoist 136, and lift the hanging object 15 to a certain height from the beam 20 by controlling the cable 1361 on the hand chain hoist 136;

[0068] Execute step S240: control the push-pull rod 135 to transport the hanging object 15 horizontally, and adjust the vertical height of the hanging object 15 by the hand chain hoist 136, and repeat the operation to transport the hanging object 15 to the designated position;

[0069] Execute step S250: limit the position of the limiting member 16 on the guide groove 121 to the front and rear of the running wheel 131, and then perform prestressing construction according to the steps;

[0070] Execute step S260: After the construction is completed, remove the limiter 16 on the guide groove 121, lift the hanging object 15 to the upper end surface of the beam 20 through the hand winch 136 and the lifting and moving device 13, and perform the unloading operation of the balance block 18.

[0071] The present invention is described in detail above in conjunction with the embodiments of the drawings. A person skilled in the art can make various changes to the present invention according to the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be the scope defined by the attached claims.

Claims

1. A work hanger suitable for prestressing construction of cantilevered beams, characterized in that: include: A base, wherein the base is movable with wheels; A bracket connected to the upper end of the base; A cantilever structure, wherein the cantilever structure is arranged on one side of the top end of the bracket, and one end of the cantilever structure is connected to the top end of the bracket; A lifting and moving device is slidably arranged on the cantilever structure, and a lifting object can be hooked at the bottom of the lifting and moving device to drive the lifting object to move.

2. The work hanger suitable for prestressing construction of cantilever beams according to claim 1, characterized in that: The cantilever structure is provided with: A guide groove is arranged along the length direction of the cantilever structure.

3. The work hanger suitable for prestressing construction of cantilever beams according to claim 2, characterized in that: The hoisting and moving device comprises: Two running wheels, the two running wheels are arranged opposite to each other in the guide groove, and the two running wheels are connected to each other by shafts, and can roll synchronously on the guide groove; Two first connecting members, the two first connecting members are respectively arranged at the outer sides of the two running wheels, and the lower ends of the two first connecting members extend towards each other; a second connecting member, the second connecting member being disposed between lower ends of two of the first connecting members; A long-rod bolt penetrates and connects the two first connecting members and the second connecting member.

4. The work hanger suitable for prestressing construction of cantilever beams according to claim 3 is characterized in that: The cantilever structure is also provided with: A plurality of limiting members are arranged in the guide groove, and a plurality of limiting members are arranged on both sides of the walking wheel, so as to limit the walking wheel.

5. The work hanger suitable for prestressing construction of cantilever beams according to claim 3, characterized in that: The mobile device further comprises: A push-pull rod, one end of which passes through the first connecting member and is connected to the shaft of the walking wheel, and the other end of which extends to the external space for construction workers to pull; A hand chain hoist is hooked below the second connecting piece, and an object is hoisted below the hand chain hoist. The hand chain hoist can move up and down to drive the position of the object to change.

6. The work hanger suitable for prestressing construction of cantilever beams according to claim 5, characterized in that: The first connecting member is provided with a notch, and the push-pull rod is correspondingly passed through the notch.

7. The work hanger suitable for prestressing construction of cantilever beams according to claim 5, characterized in that: The hand chain hoist is provided with: A hook, the hook is connected to the upper end of the hand chain hoist, and the hook is hung on the second connecting member; A hook is connected to the lower end of the hand winch, and the hook is used to hook the hanging object.

8. The work hanger suitable for prestressing construction of cantilever beams according to claim 7, characterized in that: The hook is provided with an anti-hooking device.

9. The work hanger suitable for prestressing construction of cantilever beams according to claim 7, characterized in that: A through hole is formed at the lower end of the second connecting member, and the through hole is used for the hook to hook and connect.

10. The work hanger suitable for prestressing construction of cantilever beams according to claim 1, characterized in that: Also includes: A balancing block is arranged on the upper end surface of the base.

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